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<FONT color="green">001</FONT>    package com.google.code.wicket.auth.component.value.resolver.annotation;<a name="line.1"></a>
<FONT color="green">002</FONT>    <a name="line.2"></a>
<FONT color="green">003</FONT>    import java.lang.annotation.Annotation;<a name="line.3"></a>
<FONT color="green">004</FONT>    import java.util.Map;<a name="line.4"></a>
<FONT color="green">005</FONT>    import java.util.WeakHashMap;<a name="line.5"></a>
<FONT color="green">006</FONT>    <a name="line.6"></a>
<FONT color="green">007</FONT>    /**<a name="line.7"></a>
<FONT color="green">008</FONT>     * A cache for annotations on types.<a name="line.8"></a>
<FONT color="green">009</FONT>     * <a name="line.9"></a>
<FONT color="green">010</FONT>     * @param &lt;T&gt;<a name="line.10"></a>
<FONT color="green">011</FONT>     */<a name="line.11"></a>
<FONT color="green">012</FONT>    public class AnnotationCache&lt;T extends Annotation&gt; {<a name="line.12"></a>
<FONT color="green">013</FONT>    <a name="line.13"></a>
<FONT color="green">014</FONT>        /**<a name="line.14"></a>
<FONT color="green">015</FONT>         * Factory method to get an annotation cache for a specified annotation<a name="line.15"></a>
<FONT color="green">016</FONT>         * class.<a name="line.16"></a>
<FONT color="green">017</FONT>         * <a name="line.17"></a>
<FONT color="green">018</FONT>         * @param &lt;A&gt;<a name="line.18"></a>
<FONT color="green">019</FONT>         * @param annotationType<a name="line.19"></a>
<FONT color="green">020</FONT>         * @return<a name="line.20"></a>
<FONT color="green">021</FONT>         */<a name="line.21"></a>
<FONT color="green">022</FONT>        public static &lt;A extends Annotation&gt; AnnotationCache&lt;A&gt; forAnnotationType(<a name="line.22"></a>
<FONT color="green">023</FONT>                final Class&lt;A&gt; annotationType) {<a name="line.23"></a>
<FONT color="green">024</FONT>            return new AnnotationCache&lt;A&gt;(annotationType);<a name="line.24"></a>
<FONT color="green">025</FONT>        }<a name="line.25"></a>
<FONT color="green">026</FONT>    <a name="line.26"></a>
<FONT color="green">027</FONT>        private final Class&lt;T&gt; annotationType;<a name="line.27"></a>
<FONT color="green">028</FONT>    <a name="line.28"></a>
<FONT color="green">029</FONT>        private final Map&lt;Class&lt;?&gt;, T&gt; classMap;<a name="line.29"></a>
<FONT color="green">030</FONT>    <a name="line.30"></a>
<FONT color="green">031</FONT>        /**<a name="line.31"></a>
<FONT color="green">032</FONT>         * Constructor with an annotation type.<a name="line.32"></a>
<FONT color="green">033</FONT>         * <a name="line.33"></a>
<FONT color="green">034</FONT>         * @param annotationType<a name="line.34"></a>
<FONT color="green">035</FONT>         */<a name="line.35"></a>
<FONT color="green">036</FONT>        protected AnnotationCache(final Class&lt;T&gt; annotationType) {<a name="line.36"></a>
<FONT color="green">037</FONT>            this.annotationType = annotationType;<a name="line.37"></a>
<FONT color="green">038</FONT>            this.classMap = new WeakHashMap&lt;Class&lt;?&gt;, T&gt;();<a name="line.38"></a>
<FONT color="green">039</FONT>        }<a name="line.39"></a>
<FONT color="green">040</FONT>    <a name="line.40"></a>
<FONT color="green">041</FONT>        /**<a name="line.41"></a>
<FONT color="green">042</FONT>         * Get the specified annotation on the specified type.<a name="line.42"></a>
<FONT color="green">043</FONT>         * <a name="line.43"></a>
<FONT color="green">044</FONT>         * @param type<a name="line.44"></a>
<FONT color="green">045</FONT>         * @return the annotation or null if not defined<a name="line.45"></a>
<FONT color="green">046</FONT>         */<a name="line.46"></a>
<FONT color="green">047</FONT>        public T getAnnotationForType(final Class&lt;?&gt; type) {<a name="line.47"></a>
<FONT color="green">048</FONT>            T result;<a name="line.48"></a>
<FONT color="green">049</FONT>            synchronized (this.classMap) {<a name="line.49"></a>
<FONT color="green">050</FONT>                if (this.classMap.containsKey(type)) {<a name="line.50"></a>
<FONT color="green">051</FONT>                    result = this.classMap.get(type);<a name="line.51"></a>
<FONT color="green">052</FONT>                } else {<a name="line.52"></a>
<FONT color="green">053</FONT>                    result = this.readAnnotation(type);<a name="line.53"></a>
<FONT color="green">054</FONT>                    this.classMap.put(type, result);<a name="line.54"></a>
<FONT color="green">055</FONT>                }<a name="line.55"></a>
<FONT color="green">056</FONT>            }<a name="line.56"></a>
<FONT color="green">057</FONT>            return result;<a name="line.57"></a>
<FONT color="green">058</FONT>        }<a name="line.58"></a>
<FONT color="green">059</FONT>    <a name="line.59"></a>
<FONT color="green">060</FONT>        private T readAnnotation(final Class&lt;?&gt; type) {<a name="line.60"></a>
<FONT color="green">061</FONT>            T result;<a name="line.61"></a>
<FONT color="green">062</FONT>            if (Object.class.equals(type)) {<a name="line.62"></a>
<FONT color="green">063</FONT>                result = null;<a name="line.63"></a>
<FONT color="green">064</FONT>            } else {<a name="line.64"></a>
<FONT color="green">065</FONT>                result = type.isAnnotationPresent(this.annotationType) ? type<a name="line.65"></a>
<FONT color="green">066</FONT>                        .getAnnotation(this.annotationType) : this<a name="line.66"></a>
<FONT color="green">067</FONT>                        .readAnnotation(type.getSuperclass());<a name="line.67"></a>
<FONT color="green">068</FONT>            }<a name="line.68"></a>
<FONT color="green">069</FONT>            return result;<a name="line.69"></a>
<FONT color="green">070</FONT>        }<a name="line.70"></a>
<FONT color="green">071</FONT>    <a name="line.71"></a>
<FONT color="green">072</FONT>    }<a name="line.72"></a>




























































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